teh4dA tesseract moving along the 4D axis A 4D torus rotating on the 4D axis.. 4D, meaning the common 4 dimensions, is a theoretical concept in mathematics. It has been studied byp a { text-decoration: under; color: #0059ae; } History Singapore Pools started selling 4D bets in May 1986 on newly introduced computerised gaming systems. This move to utilise